Mold-material-projecting machine



Nov. 6, 1923.

S. C. BLISS MOLD MATERIAL PROJEGTING MACHINE Filed June 15 1920 Patented Nov. 6, 1923.

UNETE SHERWOOD C. BLISS, OF BUFFALO, NEW YORK, ASSIGNOR TO AMERICAN RADIATOR I COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

MOLD-MATERIAL-PROJEGTING MACHINE.

Application filed June 15, 1920. Serial No. 389,125.

T all whom it may concern:

Be it known that I, SHERwooD O. Buss, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Mold-Material- Projecting Machines, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to improvements in machines for projecting mold material lnto molds and flasks and has for one of its objects the provision of means whereby the material may be projected into the molds to acquire any density desired.

Another object of my invention is to provide means wherby the projecting point at which the material is delivered may be varied with the minimum effort on the part of the operator.

For the purpose of disclosing my invention I have illustrated one embodiment thereof in the accompanying drawings in which:

Fig. 1 is the side elevation of a machine embodying my invention;

Fig. 2 is a plan view thereof;

Fig. 3 is a sectional view taken on the line 33 of Fig. l, and

Fig. 4 is a detailed view of the conveyor hood.

As illustrated in the drawings, I provide a mast 1 provided at its upper end with a post 2 on which is journalled for horizontal rotation a jib 3 which has a socket surrounding the post 2. An arm 4 is pivoted to the outer end of the jib, and sockets 5 and 6 are formed on the ends of the arm and jib through-which passes a pivot pin 7 for mak ing the joint connection. A laterally ex tending platform 8 is formed on a collar surrounding the pivot 7 and mounted on this platform is a driving motor 9, on the shaft 10 of which ismounted a pulley 11. This pulley 11 is centered over the joint between the jib 3 and arm 4, and the outer end of the shaft 10 is supported by a bracket 12 extending upwardly from the collar of the platform 8.

The free end of the arm 4 is bifurcated and at the end of each leg or bifurcation there is provided a journal 13 in which journal is mounted a shaft 14 carrying a pulley 15. This pulley rotatesbetween the legs of the arm 4, and passing over the pulley 11 and the pulley 15 is a conveyor belt 16 having paddles or blades 17 formed thereon. The pulleys 11 and 15 are so disposed that the belt of conveyor 16 has a downward inclination. Surrounding the outer end of the belt is a casing or cover which comprises an arcuate wall 18 and the side walls. 19. These side walls are fan shape and at their-apex are secured by bolts 20 to the sides of the legs of the arm 4. The arcuate wall 18 closely surrounds the pcriphery of the belt or conveyor and its paddles as the same pass around the pulley 15, and a portion of its distance is arranged tangentially with respect to the pulley and the sand will be unduly scattered about.

Mounted on suitable supports on each side pf the upper gallery of the beltor conveyor is a. pair of side members 22 preferably supported in position by braces secured to the arm 4, which members form with the belt a trough preventing the spilling of the sand on each side of the conveyor.

-For delivering sand to the belt or conveyor 16 I provide an inclined chute 23, the lower or delivery end'of which terminates lmmediately above the rear end of thereonveyor, and whose upper end is upturned and makes a swivel connection with the bottom of a hopper 24. This chute is supported upon one end on the jib 3 'by a brace or bracket 25, and at its opposite end by a post 26 extending upwardly from and rotating with the socket or the arm 3. It will be noted that the pivot connection between the chute and the hopper 24 is centered on the post 2 so that the chute 23 will move with the jib 3.

In operation the molding material passing from the hopper 24 is delivered by the chute 23 to the belt or conveyor 16 which belt or conveyor is travelling at the speed required to secure the desired density of the material in the mold. During the travel of the material on the belt at high speed, and particularly as it passes around the pulley 15, the material is compacted into wads by the centrifugal force tending to throw the material against the wall 18. The material is not only compacted by the centrifugal force but due to the fact that there is a certain retarding action on the part of the wall, the material is also compacted against the paddles on the conveyor so that when the material is finally delivered at a tangent to the pulley 15 and into the mold it is delivered in a series of compacted wads which are thrown at high velocity into the mold.

The conveyor is adapted. to be operated at high speeds which, oi? course, may be varied to vary the velocity at which the material is delivered to the mold and this velocity depends entirely upon the density intended to be given the molding material in the flash or mold. For certain types of castings it is, of course, not necessary that the material be so densely packed inthe mold in which event the speed of the belt will be comparatively slow, while in certain other kinds of. molds it will be necessary to have the sand densely compacted in the mold in which event, of course, the speed of the conveyor will be increased and the velocity at which the material is delivered oorrespondingly increased.

It will be noted that the weight of the parts is evenly distributed on the jib and arm, and that the minimum weight carried on the outer end of the arm 4, the motor for driving the conveyor being located at the pivotal connection between the arm and jib. Therefore the arm may be swung about with con'iparatively little eifort on the part of the operator and the material be projected into the mold at any desired point.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A machine of the character described comprising a substantially-horizontal conveyor having one end pivotally mounted and its other end free, means for actuating said conveyor, and a deflector arranged adjacent to the free end of said conveyor and cooperating with said conveyor to compact the mold material into wads prior to the discharge thereof.

2. A machine of the character described comprising a support, a substantially-horizontal conveyor having one end pivotal mounted upon said support and its other end free and adapted to swing about said support, means for actuating said conveyor, and a curved deflector supported adjacent to the free end of said conveyor and cooperating with said conveyor to compact the mold material into wads prior to the discharge thereof,

3. A machine of the character described comprising a support, a member pivotally mounted thereon, a second member pivotally mounted upon the end of said first-named member, pulleys arranged upon the outer ends of said first and second named members, a conveyor disposed upon said pulleys, means for actuating said conveyor, a curved deflector secured to the outer end of said second-named member and partly surrounding the pulley carried at the outer end of said second-named member; said deflector cooperating with said conveyor to compact the mold material into a series of wads prior to the discharge thereof.

4:. In a machine for projecting mold material, the combination with a vertically disposed support, of a jointed horizontally disposed arm pivotally mounted on said support, and pulley at the outer end of the outer section of said arm, a pulley at the outer end of the inner section of the said arm and having its center disposed in alignment with the pivotal joint of said two arms, a belt conveyor carried by said pulleys, an arouate shield for the outer end of said belt conveyor and means for delivering material 'to the inner end of said conveyor.

5. In a machine for projecting. mold material, the combination with a vertically disposed support of a jointed arm pivotally mounted on said support, a pulleymounted at the outer end of the inner section of said jointed arm and having its center co-incident with the joint'of said arm, a pulley at the outer end of the outer sect-ion of said arm and disposed below the plane of first mentioned pulley, a belt conveyor mounted on said pulleys, an arcuate cover for the outer end of said belt conveyor as it passes over the pulley and an inclined chute supported on said inner arm section having its center co-incident with the center of the supporting post and delivering sand from its outer end to said belt conveyor.

In witness whereof, I have hereunto subscribed my name.

SHERWOOD G. BLISS. 

